ttt-root {
  margin: 100px auto;
  display: block;
  width: 700px;
  padding: 20px 40px;
  background: #dff;
  box-shadow: 0 0 2px 2px rgba(0,0,0,0.3);
}
h1 {
  display: inline-block;
}
button {
  float: right;
  margin-top: 15px;
  font-size: 24px;
  border-radius: 2px;
  background: transparent;
}
table {
  margin: 0 auto;
}
.cell-content {
  cursor: pointer;
  font-size: 48px;
  background: white;
  width: 100px;
  height: 100px;
  display: inline-block;
  line-height: 100px;
  border-radius: 10px;
  text-align: center;
}
